What is optical fibre?

Optical fibre is the technology of the future – ultra-fine and more powerful than any other type of cable.


Optical Fibre

An optical fibre is an ultra-fine glass fibre that conducts light without any significant loss and over very long distances. Because of its specific properties and following the development of optoelectronic components that modulate the light, fibre optics are mainly used to transmit data streams.

Optical fibre transfer information at a markedly higher speed than copper phone cables or even coaxial cables. It is the main component of broadband networks such as the one currently being installed by POST Technologies.

This type of network can simultaneously transmit an almost unlimited amount of data. Distributors can simultaneously offer their customers a phone connection, ultra-high-speed internet, TV (IPTV), video conferencing, etc.


Structure of a fibre optic cable

The glass fibres consist of a core, enveloped by a casing with a slightly weaker refractive index. As a result, a total reflection occurs, which transports the light. The casing usually consists of pure silica so the higher refractive index of the core is usually the result of dipping the silica in germanium or phosphorus.
The core from pure SiO2 and dipped casing can also be achieved with a fluor or borium atom, which reduces the refractive index.


The casing forms a protective layer, which acts as a buffer, as well as an external protective insulation. The external insulation protects the fibre against mechanical damage and humidity. It generally consists of a cover in special plastic.